.car-img{
    width:100%
}

nav{
    margin-top:20px;
}

#sd{
    top:0px;
    position: absolute;
    width: 100%;
    z-index:-9;
}

.to-top{
    z-index: 99;
}

.carousel-item{
    height: 400px;
    background-image:url("http://v2.bootcss.com/assets/img/examples/slide-03.jpg");
    background-repeat: no-repeat;
    background-position: top;
}

.itme-1{
    background-image:url("http://v2.bootcss.com/assets/img/examples/slide-03.jpg");
}
.itme-2{
    background-image:url("http://v2.bootcss.com/assets/img/examples/slide-03.jpg");
}
.itme-3{
    background-image:url("http://v2.bootcss.com/assets/img/examples/slide-03.jpg");
}